Elkem LSR-4350 Silicone Elastomer (A-225-50)

A-225-50 (LSR 4350) Liquid Silicone Rubber – Shore A 50

A-225-50 is part of the Elkem LSR 4300 Series, a platinum-cure liquid silicone rubber engineered for liquid injection molding (LIM) applications requiring high strength, durability, and structural performance. With a Shore A 50 durometer, it offers a firmer elastomer with excellent resilience and mechanical stability.

This two-part, 100% solids system is supplied as a pumpable, colorless, translucent paste. When Parts A and B are mixed in a 1:1 ratio, the material cures via addition-cure (platinum) chemistry to form a tough, optically clear elastomer with outstanding physical properties.

Product Features

• Shore A 50 silicone elastomer

• Elkem LSR 4300 Series (LSR 4350)

• 1:1 mix ratio (Part A : Part B)

• Platinum (addition-cure), solvent-free system

• High clarity / translucent appearance

• Long working time

• Designed for liquid injection molding (LIM)

• Produces strong, durable, high-performance parts

Processing Notes

• Non-pourable – designed for pump/injection systems

• Supplied as a paste-like material

• Requires heat curing for full vulcanization

Cartridge Options

• Available in 50 mL, 200 mL, and 400 mL cartridge systems

• Can be pigmented for custom color matching

Applications

• Injection molded silicone components

• Applications requiring high strength and durability

• High-clarity, precision molded parts

A robust LSR material designed for demanding applications where strength, consistency, and performance are critical.